----- Original Message -----
Sent: Monday, January 17, 2005 3:54
AM
Subject: [iris-photos] Analysis of MV's
sedlings absence ofabsence of carotene and anthocyanin in #9
First, thanks to both Chuck and Margie.
This is a great cross to analyze. Thank you so much for
sharing the seedlings Margie, and thanks for spending the time to break it
down for us Chuck.
I gathered that not everyone has the photos
saved, so I threw together a page so you can scroll down and see the
seedlings all on one page. It will probably load slowly because I
found that reducing the photo size greatly altered the quality. Here's the
link : http://www.irises.homestead.com/margiesseedlings.html
Well, for what its worth, I'm going to try and
sort through this. Seedling #9 has both a reduction of
anthocyanin and carotene for the most part. From reading TWOI, it
looks like several different locis must be involved. Since
neither parent is white, the dominant I would not be present in either
parent (though I sub s is.) That would leave it as one of the
recessive white loci since it does not look like a
glaciata. That would lead me to believe that w sub 1 and w
sub 2 are involved. The color in the veins does appear to have
some anthocyanin (TWOI p 401), so it is possible that both parents are
W sub 1, w sub 1, w sub , w sub 1
or possibly one W sub 1, W sub1, w sub , w
sub1.
As to the Carotene inheritance, there is much
less info in TWOI. It could be any one of the y sub 1,2 or
3. Because the y sub 1 info indicates that only the hafts
have carotene, I would guess that y sub 1 might be involved. I'm going
to have to think on this with a clearer head before tossing out any more
guesses. Its getting too late.
Robin Shadlow
zone 5 NE
